Collapsible headset



FIG. 1 is a front elevational view of the collapsible headset of the present invention showing one side of the headset in collapsed condition and the other side extended;

FIG. 2 is an end elevational view thereof showing the extended end of the collapsible headset;

FIG. 3 is an end elevational view thereof taken from the collapsed end of the collapsible headset;

FIG. 4 is a top plan view thereof; and

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a collapsible headset, as shown. 